<template>
  <div class="hello">
    <h1>{{ msg }}</h1>
    <p>{{ count }}</p>
    <button @click="comein()">子组件按键</button>
  </div>
</template>

<script>
export default {
  name: 'HelloWorld',
  props: {
    msg: String,
    count: {
      type: [String, Number],
    }
  },
  data(){
    return {
      indata: 0,
    }
  },
  methods:{
    comein () {
      this.indata++;
      this.$emit("change",this.indata);
    }
  },
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
h3 {
  margin: 40px 0 0;
}
ul {
  list-style-type: none;
  padding: 0;
}
li {
  display: inline-block;
  margin: 0 10px;
}
a {
  color: #42b983;
}
</style>
